Door-check.



PATENTED FEB. 21, 1905.

P. FRASER. DOOR CHECK.

APPLICATION FILED mm: 1.1904.

UNITED STATES 'v Fatented February 21, 1905.

PATENT OFFICE.

DOOR-CH ECK.

SPECIFICATION forming part of Letters Patent No. 783,033, dated February 2.1, 1905.

I Application filed June 7, 1904. Serial No. 211,532.

To all whmn it may concern.-

Be it known that I, PETER FRASER, a subject of the King of England, residing at Gel-miston, in the Colony of the Transvaal, have invented certain new and useful Improvements in Devices for llIaintaining Doors or the Like in an'Open Position, of which the following is a specification.

The present invention consists of a device designed for holding or maintaining doors or the like in any desired open position.

By means of the contrivance a door can be retained in any required open position. For

example, the door may be opened for a short distance for ventilating purposes or to allow of the ingress or egress of a current of air into or out of the room and retained in that position. In like manner it may beheld wide open or in any intermediate position.

While the contrivance does not prevent the free opening of the door, it prevents it being farther opened or closed by the draft or current of air passing into or out of the room. It provides a simple and cheap device which may be readily fixed to any door or partition.

The contrivance may be readily adjusted after being fixed in position. It operates antomatically once it is fixed, so that it is only i necessary to open the door to the desired extent, when it operates to keep it in that position. The invention will now be described by aid of the accompanying drawings, wherein Figure 1 shows the device in front elevation fixed to the corner of a door or partition, and Fig. 2 is a sectional side elevation of the contrivance.

The contrivance is fixed, preferably, to the bottom corner of the door A on the inside or to the bottom corner farthest from the hinges, although it may be fixed in any other suitable position along the bottom edge of the door. The device comprises a hollow cylinder or tube B, constructed with a fiat face 6 to fit against the door, and with lugs b, formed with holes for fixing it by means of the screws 6 or the like to the door A. The cylinder B is open at both ends.

C is a roller of rubber or. other suitable, preferably elastic or resilient, material. The

roller C is carried by a spindle or frame comprising a flat horizontal plate 0, formed at each end with downwardly-projecting lugs or brackets c, which carry at their lower ends a pin 0 for the roller C. ()n the plate 0 of the roller-frame is formed a vertical cylindrical projection 0 which is made slightly less In diameter than the diameter of the hole in tlie cylinder B. The cylindrical piece or projection 0 fits or is projected into the lower end of the cylinder B, in which it is free to move vertically within certain limits. In the cylindrical projection c is formed a vertical groove 0, and through the frontof the cylinder B is screwed or otherwise fixed'a small screw or pin 0 which on the inside projects into the vertical groove 0 in the cylindrical piece 0 This screw or pin 0 by engaging the groove operates to prevent the spindle c rotating in the cylinder B and maintains the axis of the roller parallel with the bottom edge of the door A.

In the cylinder B above the cylindrical projection a is arranged a spiral spring D, the bottom of which rests upon the top of the cylindrical projection 0 In the top of the cylinder B is formed an internal screw-thread b, and into this end of the cylinder is screwed an ad justing-screw F. The end of the screw F inside the cylinder B engages the top of the spring D, so that by screwing the screw F downward or into the cylinder B the spring is placed in compression, and when it is screwed outward, or in the reverse direction, the amount of compression of the spring is reduced. It will now be understood that by this means the screw F provides a ready means for adjusting the pressure with which the rubber roller C is forced against the floor. This allows the contrivance to be adjusted as may be required after it has been fixed in position on the door to insure that the pressure exerted by the roller C is sufficient to prevent the door being blown open or to maintain it in any desired position in which it may be placed.

It will be evident that the top of the cylinder B may be closed and the adjusting-screw dispensed with; but I prefer the arrangement described, as it enables the pressure of the I00 ,at the bottom of the groove 0*.

spring to be adjusted and facilitates the fixing of the contrivance to the door.

In fitting the contrivance to the door the cylinder B is fixed in such a position that the roller just clears the floor when the pin 0 is After the cylifider B has been fixed to the door the spring D is then inserted into the top of the cylinder and the adj usting-screw screwed into the top of the cylinder B to compress the spring to the requisite degree. The pressure with which the roller is forced onto the ground or fioor by the spring is suiiicicnt to retain the door in any position in which it may be placed, while it does not prevent the door being easily opened or closed, as may be required.

hat I claim as my invention, and desire to protect by Letters Patent, is

1. A contrivance for maintaining doors or the like in an open position, comprising in combination a cylinder, means for fixing same to the'bottom of the door, a roller of resilient material, a frame or spindle carrying said roller, a groove formed in said spindle, a pin fixed in the cylinder engaging said groove for preventing the rotation of said spindle inside the cylinder, a spiral spring in the cylinder above the spindle engaging the top of the spindle, and a screw in the top of the cylinder for adjusting the spring, substantially as described.

2. A contrivance for maintaining doors or the like in an open position, comprising in combination, the cylinder formed with the flat face to fit the door and with the lugs b for fixing it to the door, the screws 6 the rubber roller G and the pin 0 the spindle or frame comprising the plate 0 and the downwardlyprojecting lugs 0' for the pin 0 and the cylindrical projection a projected into the lower open end of the cylinder 13, the groove 0 in the cylindrical projection 0 the pin a fixed in the cylinder and engaging the groove 0 to prevent the rotation of the roller-spindle inside the cylinder, the spiral spring D in the cylinder engaging the top of the cylindrical projection, and the screw F in the top of the cylinder for adjusting the spring, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two subscribing witnesses.

I PETER FRASER. Witnesses:

CHAS. OVENDALE, R. OVENDALE. 

